氮掺杂碳纳米粒子对红壤中氮损失及盐基离子的影响

发布时间：2018-06-01 00:23

  本文选题：氮掺杂碳纳米粒子 + 红壤　； 参考：《农业环境科学学报》2017年01期

【摘要】：采用室内模拟装置淋溶土柱的方法,研究了氮掺杂碳纳米粒子(N-CNPs)配施尿素对红壤中尿素氮损失和土壤盐基离子的影响。结果表明:N-CNPs伴随尿素施入红壤后,在p H4.38的模拟酸雨多次淋溶条件下,能显著降低红壤氮素损失率;氮素损失率与N-CNPs的施用量呈正相关,15‰N-CNPs配施尿素处理总氮损失率仅为单施尿素处理的49.45%;5‰N-CNPs用量所表现出的氮素损失率与5%双氰胺(DCD)处理结果相近。N-CNPs施用后,土壤交换性阳离子淋失量降低,具体表现为Ca2+Mg2+Na+K+,p H值和盐基饱和度(BS)升高,且与N-CNPs用量呈显著正相关(P0.05)。这些结果表明,土壤p H值和BS的改善可能是N-CNPs施用于红壤后引起土壤氮素淋失降低的原因之一。
[Abstract]:The effects of nitrogen-doped carbon nanoparticles (N-CNPs) and urea on the loss of urea nitrogen and the base ions of soil in red soil were studied by means of leaching soil column in laboratory simulation device. The results showed that the nitrogen loss rate of red soil could be significantly decreased under the condition of simulated acid rain leaching of pH4.38 with the addition of urea to red soil. There was a positive correlation between the nitrogen loss rate and the application rate of N-CNPs. The total nitrogen loss rate of 15 鈥，

本文编号：1962017